Cooperative interaction of carboxymethyl cellulose with C.I. basic red 18 in aqueous solution
| Autor: | Toshiro Iijima, Yasuko Ando, Juichi Koshikawa, Soo‐Min ‐M Pak |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution genetic structures Polymers and Plastics Cooperativity General Chemistry Polymer Condensed Matter Physics Binding constant Carboxymethyl cellulose Crystallography chemistry.chemical_compound chemistry Materials Chemistry medicine Organic chemistry Dye molecule Cellulose Cooperative interaction medicine.drug |
| Zdroj: | Journal of Macromolecular Science, Part B. 23:85-91 |
| ISSN: | 1525-609X 0022-2348 |
| Popis: | The binding isotherms of C.I. Basic Red 18 with carboxy-methyl cellulose having various degrees of substitution have been determined in an acetate buffer at pH 4.2 and 30°C by a dynamic dialysis technique. The isotherms show a sigmoidal increase of binding with increasing free dye concentration in solution. The results strongly suggest a cooperative mode of binding. In the interpretation of the results, McGhee and von Hippel's theory considering cooperativity in binding was used. The intrinsic binding constant K, the number of consecutive polymer residues occupied by a single dye molecule n, and the cooperativity parameter were determined. A molecular mechanism of binding is proposed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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